Is part of male chastity making them want it even more when you aren't letting them have any? It is just the kind of wickedness that appeals to me. Plus, chastity is a double edged sword. (If you want to have sex with them, you can't really keep them locked up and unavailable).
So is the real fun for the Domme in keeping them in chastity for extended periods of time or in giving them temptation and hope that it won't last very long?
Then Feministing puts the whole thing in another perspective. That's one I need time to think about when it's not late at night and I'm thinking about getting to bed.